201220231441 has 4 divisors (see below), whose sum is σ = 201256976052. Its totient is φ = 201183486832.

The previous prime is 201220231397. The next prime is 201220231501. The reversal of 201220231441 is 144132022102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 199090870416 + 2129361025 = 446196^2 + 46145^2 .

It is a cyclic number.

It is not a de Polignac number, because 201220231441 - 2¹³ = 201220223249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201220232441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18364090 + ... + 18375043.

It is an arithmetic number, because the mean of its divisors is an integer number (50314244013).

Almost surely, 2^201220231441 is an apocalyptic number.

It is an amenable number.

201220231441 is a deficient number, since it is larger than the sum of its proper divisors (36744611).

201220231441 is an equidigital number, since it uses as much as digits as its factorization.

201220231441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36744610.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 201220231441 its reverse (144132022102), we get a palindrome (345352253543).

The spelling of 201220231441 in words is "two hundred one billion, two hundred twenty million, two hundred thirty-one thousand, four hundred forty-one".